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Thelephora subclavigera (Litsch.) Kõljalg, I. Saar & Svantesson 2024

Syn.: Tomentella subclavigera Litsch. 1933

Basidiome: adherent, thin
Hymenophore: smooth to granular, gray to hazelnut-brown
Margin: same color as the hymenophore, inconspicuous
Rhizomorphs: absent
Subiculum: same color as the hymenophore, often absent

Subicular hyphae: hyaline to brownish, with clamps, thin-walled, not encrusted, 3.5–6 µm wide
Subhymenial hyphae: hyaline, rarely brownish, partly swollen and short-celled, with clamps, thin-walled, not encrusted, 4–7 µm wide
Cystidia: hyaline, clavate to slightly capitate, 80–140 µm long, 5 µm wide at the base, up to 10 µm wide at the apex
Basidia: hyaline, with basal clamps
Spores: brownish, round to broadly elliptical from frontal and lateral views, 6.5–8 µm, spines up to 1 µm long

Distribution: Found worldwide in temperate regions. In Germany, it is considered a rare species.
Note: The very similar Thelephora clavigera differs only by having more irregular and slightly larger spores.

drawing: H. Maser Photo: Matthias Theiss